KEEP BRITAIN TIDY

Cigarette butts dropped down drains end up in rivers, where they can poison wildlife. So we changed The White Swan in Twickenham, into The Poisoned Swan.

We then got Jonny Vegas, who's previously had beef with Doncaster council for dropping a cigarette butt in a drain, down for a pint. He felt bad about his past mistakes, but we felt quite good because our little stunt made it onto BBC Breakfast.

Team: Ludo Thomas and Arthur Harry.